论文标题
通过主动相互作用切换来控制限制软胶体的微结构和相位行为
Controlling the microstructure and phase behavior of confined soft colloids by active interaction switching
论文作者
论文摘要
我们探讨了密闭软胶体的微观结构和相行为，这些胶体可以以预定义的动力学速率主动切换其相互作用。为此，我们采用了一种基于反应动力学密度功能理论（R-DDFT）的反应扩散方法，并研究了胶体大小与高斯对势相互作用的二元（两态）切换的影响。以低速率和有效的单分散液体以较大的速率切换在接近平衡的二进制高斯混合物之间插值的速率，因此强烈影响一体密度的剖面，吸附和限制壁的压力。重要的是，我们证明，足够快速的切换阻碍了（平衡）不稳定液体的相位分离，从而通过调整切换速率来动态控制混合/凝结/凝结程度和局部微型结构的程度。
We explore the microstructure and phase behavior of confined soft colloids which can actively switch their interactions at a predefined kinetic rate. For this, we employ a reaction-diffusion approach based on a reactive dynamical density-functional theory (R-DDFT) and study the effect of a binary (two-state) switching of the size of colloids interacting with a Gaussian pair potential. The rate of switching interpolates between a near-equilibrium binary Gaussian mixture at low rates and an effective monodisperse liquid for large rates, hence strongly affecting the one-body density profiles, adsorption, and pressure at confining walls. Importantly, we demonstrate that sufficiently fast switching impedes the phase separation of an (in equilibrium) unstable liquid, allowing the dynamic control of the degree of mixing/condensation and local micro-structuring in a cellular confinement by tuning the switching rate.
